On Wed, Feb 6, 2013 at 12:50 PM, <Valdis.Kletnieks@vt.edu> wrote:
On Wed, 06 Feb 2013 13:21:17 +0800, horseriver said:
At booting stage,kernel need to detect the hard device before mount it, does this work need pci's surport?
That depends. Is the controller for the hard drive a PCI-based controller? On most x86-based boxes, it is (and I'm not sure it's even possible to build an x86 kernel that doesn't have PCI as a =y in the config). However, very old units may still have ISA based disk controllers, and other archs may have other I/O buses.
Most new MB's have a SATA controller directly on the MB connected directly to either the North or South bridge (I don't know which). I don't think any PCI is support needed to talk to the boot disk. Greg